require 'rvg/rvg'

rvg = Magick::RVG.new(300, 100) do |canvas|
  canvas.desc = "Example - SVG's initial coordinate system"
  canvas.background_fill = 'white'
  canvas.g.styles(fill: 'none', stroke: 'black', stroke_width: 3) do |grp|
    grp.line(0, 1.5, 300, 1.5)
    grp.line(1.5, 0, 1.5, 100)
  end
  canvas.g.styles(fill: 'red', stroke: 'none') do |grp|
    grp.rect(3, 3)
    grp.rect(3, 3, 297, 0)
    grp.rect(3, 3,   0, 97)
  end
  canvas.g.styles(font_size: 14, font_family: 'Verdana', font_weight: 'normal', font_style: 'normal') do |grp|
    grp.text(10, 20, '(0,0)')
    grp.text(240, 20, '(300,0)')
    grp.text(10, 90, '(0,100)')
  end
end

rvg.draw.write('initial_coords.gif')
